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a43f6a86 JA |
1 | /* |
2 | * LED Flash class driver for the flash cell of max77693 mfd. | |
3 | * | |
4 | * Copyright (C) 2015, Samsung Electronics Co., Ltd. | |
5 | * | |
6 | * Authors: Jacek Anaszewski <j.anaszewski@samsung.com> | |
7 | * Andrzej Hajda <a.hajda@samsung.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * version 2 as published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/led-class-flash.h> | |
15 | #include <linux/mfd/max77693.h> | |
61b305cd | 16 | #include <linux/mfd/max77693-common.h> |
a43f6a86 JA |
17 | #include <linux/mfd/max77693-private.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/mutex.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/regmap.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/workqueue.h> | |
0b380186 | 24 | #include <media/v4l2-flash-led-class.h> |
a43f6a86 JA |
25 | |
26 | #define MODE_OFF 0 | |
27 | #define MODE_FLASH(a) (1 << (a)) | |
28 | #define MODE_TORCH(a) (1 << (2 + (a))) | |
29 | #define MODE_FLASH_EXTERNAL(a) (1 << (4 + (a))) | |
30 | ||
31 | #define MODE_FLASH_MASK (MODE_FLASH(FLED1) | MODE_FLASH(FLED2) | \ | |
32 | MODE_FLASH_EXTERNAL(FLED1) | \ | |
33 | MODE_FLASH_EXTERNAL(FLED2)) | |
34 | #define MODE_TORCH_MASK (MODE_TORCH(FLED1) | MODE_TORCH(FLED2)) | |
35 | ||
36 | #define FLED1_IOUT (1 << 0) | |
37 | #define FLED2_IOUT (1 << 1) | |
38 | ||
39 | enum max77693_fled { | |
40 | FLED1, | |
41 | FLED2, | |
42 | }; | |
43 | ||
44 | enum max77693_led_mode { | |
45 | FLASH, | |
46 | TORCH, | |
47 | }; | |
48 | ||
49 | struct max77693_led_config_data { | |
50 | const char *label[2]; | |
51 | u32 iout_torch_max[2]; | |
52 | u32 iout_flash_max[2]; | |
53 | u32 flash_timeout_max[2]; | |
54 | u32 num_leds; | |
55 | u32 boost_mode; | |
56 | u32 boost_vout; | |
57 | u32 low_vsys; | |
58 | }; | |
59 | ||
60 | struct max77693_sub_led { | |
61 | /* corresponding FLED output identifier */ | |
62 | int fled_id; | |
63 | /* corresponding LED Flash class device */ | |
64 | struct led_classdev_flash fled_cdev; | |
65 | /* assures led-triggers compatibility */ | |
66 | struct work_struct work_brightness_set; | |
0b380186 JA |
67 | /* V4L2 Flash device */ |
68 | struct v4l2_flash *v4l2_flash; | |
a43f6a86 JA |
69 | |
70 | /* brightness cache */ | |
71 | unsigned int torch_brightness; | |
72 | /* flash timeout cache */ | |
73 | unsigned int flash_timeout; | |
74 | /* flash faults that may have occurred */ | |
75 | u32 flash_faults; | |
76 | }; | |
77 | ||
78 | struct max77693_led_device { | |
79 | /* parent mfd regmap */ | |
80 | struct regmap *regmap; | |
81 | /* platform device data */ | |
82 | struct platform_device *pdev; | |
83 | /* secures access to the device */ | |
84 | struct mutex lock; | |
85 | ||
86 | /* sub led data */ | |
87 | struct max77693_sub_led sub_leds[2]; | |
88 | ||
89 | /* maximum torch current values for FLED outputs */ | |
90 | u32 iout_torch_max[2]; | |
91 | /* maximum flash current values for FLED outputs */ | |
92 | u32 iout_flash_max[2]; | |
93 | ||
94 | /* current flash timeout cache */ | |
95 | unsigned int current_flash_timeout; | |
96 | /* ITORCH register cache */ | |
97 | u8 torch_iout_reg; | |
98 | /* mode of fled outputs */ | |
99 | unsigned int mode_flags; | |
100 | /* recently strobed fled */ | |
101 | int strobing_sub_led_id; | |
102 | /* bitmask of FLED outputs use state (bit 0. - FLED1, bit 1. - FLED2) */ | |
103 | u8 fled_mask; | |
104 | /* FLED modes that can be set */ | |
105 | u8 allowed_modes; | |
106 | ||
107 | /* arrangement of current outputs */ | |
108 | bool iout_joint; | |
109 | }; | |
110 | ||
111 | static u8 max77693_led_iout_to_reg(u32 ua) | |
112 | { | |
113 | if (ua < FLASH_IOUT_MIN) | |
114 | ua = FLASH_IOUT_MIN; | |
115 | return (ua - FLASH_IOUT_MIN) / FLASH_IOUT_STEP; | |
116 | } | |
117 | ||
118 | static u8 max77693_flash_timeout_to_reg(u32 us) | |
119 | { | |
120 | return (us - FLASH_TIMEOUT_MIN) / FLASH_TIMEOUT_STEP; | |
121 | } | |
122 | ||
123 | static inline struct max77693_sub_led *flcdev_to_sub_led( | |
124 | struct led_classdev_flash *fled_cdev) | |
125 | { | |
126 | return container_of(fled_cdev, struct max77693_sub_led, fled_cdev); | |
127 | } | |
128 | ||
129 | static inline struct max77693_led_device *sub_led_to_led( | |
130 | struct max77693_sub_led *sub_led) | |
131 | { | |
132 | return container_of(sub_led, struct max77693_led_device, | |
133 | sub_leds[sub_led->fled_id]); | |
134 | } | |
135 | ||
136 | static inline u8 max77693_led_vsys_to_reg(u32 mv) | |
137 | { | |
138 | return ((mv - MAX_FLASH1_VSYS_MIN) / MAX_FLASH1_VSYS_STEP) << 2; | |
139 | } | |
140 | ||
141 | static inline u8 max77693_led_vout_to_reg(u32 mv) | |
142 | { | |
143 | return (mv - FLASH_VOUT_MIN) / FLASH_VOUT_STEP + FLASH_VOUT_RMIN; | |
144 | } | |
145 | ||
146 | static inline bool max77693_fled_used(struct max77693_led_device *led, | |
147 | int fled_id) | |
148 | { | |
149 | u8 fled_bit = (fled_id == FLED1) ? FLED1_IOUT : FLED2_IOUT; | |
150 | ||
151 | return led->fled_mask & fled_bit; | |
152 | } | |
153 | ||
154 | static int max77693_set_mode_reg(struct max77693_led_device *led, u8 mode) | |
155 | { | |
156 | struct regmap *rmap = led->regmap; | |
157 | int ret, v = 0, i; | |
158 | ||
159 | for (i = FLED1; i <= FLED2; ++i) { | |
160 | if (mode & MODE_TORCH(i)) | |
161 | v |= FLASH_EN_ON << TORCH_EN_SHIFT(i); | |
162 | ||
163 | if (mode & MODE_FLASH(i)) { | |
164 | v |= FLASH_EN_ON << FLASH_EN_SHIFT(i); | |
165 | } else if (mode & MODE_FLASH_EXTERNAL(i)) { | |
166 | v |= FLASH_EN_FLASH << FLASH_EN_SHIFT(i); | |
167 | /* | |
168 | * Enable hw triggering also for torch mode, as some | |
169 | * camera sensors use torch led to fathom ambient light | |
170 | * conditions before strobing the flash. | |
171 | */ | |
172 | v |= FLASH_EN_TORCH << TORCH_EN_SHIFT(i); | |
173 | } | |
174 | } | |
175 | ||
176 | /* Reset the register only prior setting flash modes */ | |
177 | if (mode & ~(MODE_TORCH(FLED1) | MODE_TORCH(FLED2))) { | |
178 | ret = regmap_write(rmap, MAX77693_LED_REG_FLASH_EN, 0); | |
179 | if (ret < 0) | |
180 | return ret; | |
181 | } | |
182 | ||
183 | return regmap_write(rmap, MAX77693_LED_REG_FLASH_EN, v); | |
184 | } | |
185 | ||
186 | static int max77693_add_mode(struct max77693_led_device *led, u8 mode) | |
187 | { | |
188 | u8 new_mode_flags; | |
189 | int i, ret; | |
190 | ||
191 | if (led->iout_joint) | |
192 | /* Span the mode on FLED2 for joint iouts case */ | |
193 | mode |= (mode << 1); | |
194 | ||
195 | /* | |
196 | * FLASH_EXTERNAL mode activates FLASHEN and TORCHEN pins in the device. | |
197 | * Corresponding register bit fields interfere with SW triggered modes, | |
198 | * thus clear them to ensure proper device configuration. | |
199 | */ | |
200 | for (i = FLED1; i <= FLED2; ++i) | |
201 | if (mode & MODE_FLASH_EXTERNAL(i)) | |
202 | led->mode_flags &= (~MODE_TORCH(i) & ~MODE_FLASH(i)); | |
203 | ||
204 | new_mode_flags = mode | led->mode_flags; | |
205 | new_mode_flags &= led->allowed_modes; | |
206 | ||
207 | if (new_mode_flags ^ led->mode_flags) | |
208 | led->mode_flags = new_mode_flags; | |
209 | else | |
210 | return 0; | |
211 | ||
212 | ret = max77693_set_mode_reg(led, led->mode_flags); | |
213 | if (ret < 0) | |
214 | return ret; | |
215 | ||
216 | /* | |
217 | * Clear flash mode flag after setting the mode to avoid spurious flash | |
218 | * strobing on each subsequent torch mode setting. | |
219 | */ | |
220 | if (mode & MODE_FLASH_MASK) | |
221 | led->mode_flags &= ~mode; | |
222 | ||
223 | return ret; | |
224 | } | |
225 | ||
226 | static int max77693_clear_mode(struct max77693_led_device *led, | |
227 | u8 mode) | |
228 | { | |
229 | if (led->iout_joint) | |
230 | /* Clear mode also on FLED2 for joint iouts case */ | |
231 | mode |= (mode << 1); | |
232 | ||
233 | led->mode_flags &= ~mode; | |
234 | ||
235 | return max77693_set_mode_reg(led, led->mode_flags); | |
236 | } | |
237 | ||
238 | static void max77693_add_allowed_modes(struct max77693_led_device *led, | |
239 | int fled_id, enum max77693_led_mode mode) | |
240 | { | |
241 | if (mode == FLASH) | |
242 | led->allowed_modes |= (MODE_FLASH(fled_id) | | |
243 | MODE_FLASH_EXTERNAL(fled_id)); | |
244 | else | |
245 | led->allowed_modes |= MODE_TORCH(fled_id); | |
246 | } | |
247 | ||
248 | static void max77693_distribute_currents(struct max77693_led_device *led, | |
249 | int fled_id, enum max77693_led_mode mode, | |
250 | u32 micro_amp, u32 iout_max[2], u32 iout[2]) | |
251 | { | |
252 | if (!led->iout_joint) { | |
253 | iout[fled_id] = micro_amp; | |
254 | max77693_add_allowed_modes(led, fled_id, mode); | |
255 | return; | |
256 | } | |
257 | ||
258 | iout[FLED1] = min(micro_amp, iout_max[FLED1]); | |
259 | iout[FLED2] = micro_amp - iout[FLED1]; | |
260 | ||
261 | if (mode == FLASH) | |
262 | led->allowed_modes &= ~MODE_FLASH_MASK; | |
263 | else | |
264 | led->allowed_modes &= ~MODE_TORCH_MASK; | |
265 | ||
266 | max77693_add_allowed_modes(led, FLED1, mode); | |
267 | ||
268 | if (iout[FLED2]) | |
269 | max77693_add_allowed_modes(led, FLED2, mode); | |
270 | } | |
271 | ||
272 | static int max77693_set_torch_current(struct max77693_led_device *led, | |
273 | int fled_id, u32 micro_amp) | |
274 | { | |
275 | struct regmap *rmap = led->regmap; | |
276 | u8 iout1_reg = 0, iout2_reg = 0; | |
277 | u32 iout[2]; | |
278 | ||
279 | max77693_distribute_currents(led, fled_id, TORCH, micro_amp, | |
280 | led->iout_torch_max, iout); | |
281 | ||
282 | if (fled_id == FLED1 || led->iout_joint) { | |
283 | iout1_reg = max77693_led_iout_to_reg(iout[FLED1]); | |
284 | led->torch_iout_reg &= TORCH_IOUT_MASK(TORCH_IOUT2_SHIFT); | |
285 | } | |
286 | if (fled_id == FLED2 || led->iout_joint) { | |
287 | iout2_reg = max77693_led_iout_to_reg(iout[FLED2]); | |
288 | led->torch_iout_reg &= TORCH_IOUT_MASK(TORCH_IOUT1_SHIFT); | |
289 | } | |
290 | ||
291 | led->torch_iout_reg |= ((iout1_reg << TORCH_IOUT1_SHIFT) | | |
292 | (iout2_reg << TORCH_IOUT2_SHIFT)); | |
293 | ||
294 | return regmap_write(rmap, MAX77693_LED_REG_ITORCH, | |
295 | led->torch_iout_reg); | |
296 | } | |
297 | ||
298 | static int max77693_set_flash_current(struct max77693_led_device *led, | |
299 | int fled_id, | |
300 | u32 micro_amp) | |
301 | { | |
302 | struct regmap *rmap = led->regmap; | |
303 | u8 iout1_reg, iout2_reg; | |
304 | u32 iout[2]; | |
305 | int ret = -EINVAL; | |
306 | ||
307 | max77693_distribute_currents(led, fled_id, FLASH, micro_amp, | |
308 | led->iout_flash_max, iout); | |
309 | ||
310 | if (fled_id == FLED1 || led->iout_joint) { | |
311 | iout1_reg = max77693_led_iout_to_reg(iout[FLED1]); | |
312 | ret = regmap_write(rmap, MAX77693_LED_REG_IFLASH1, | |
313 | iout1_reg); | |
314 | if (ret < 0) | |
315 | return ret; | |
316 | } | |
317 | if (fled_id == FLED2 || led->iout_joint) { | |
318 | iout2_reg = max77693_led_iout_to_reg(iout[FLED2]); | |
319 | ret = regmap_write(rmap, MAX77693_LED_REG_IFLASH2, | |
320 | iout2_reg); | |
321 | } | |
322 | ||
323 | return ret; | |
324 | } | |
325 | ||
326 | static int max77693_set_timeout(struct max77693_led_device *led, u32 microsec) | |
327 | { | |
328 | struct regmap *rmap = led->regmap; | |
329 | u8 v; | |
330 | int ret; | |
331 | ||
332 | v = max77693_flash_timeout_to_reg(microsec) | FLASH_TMR_LEVEL; | |
333 | ||
334 | ret = regmap_write(rmap, MAX77693_LED_REG_FLASH_TIMER, v); | |
335 | if (ret < 0) | |
336 | return ret; | |
337 | ||
338 | led->current_flash_timeout = microsec; | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
343 | static int max77693_get_strobe_status(struct max77693_led_device *led, | |
344 | bool *state) | |
345 | { | |
346 | struct regmap *rmap = led->regmap; | |
347 | unsigned int v; | |
348 | int ret; | |
349 | ||
350 | ret = regmap_read(rmap, MAX77693_LED_REG_FLASH_STATUS, &v); | |
351 | if (ret < 0) | |
352 | return ret; | |
353 | ||
354 | *state = v & FLASH_STATUS_FLASH_ON; | |
355 | ||
356 | return ret; | |
357 | } | |
358 | ||
359 | static int max77693_get_flash_faults(struct max77693_sub_led *sub_led) | |
360 | { | |
361 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
362 | struct regmap *rmap = led->regmap; | |
363 | unsigned int v; | |
364 | u8 fault_open_mask, fault_short_mask; | |
365 | int ret; | |
366 | ||
367 | sub_led->flash_faults = 0; | |
368 | ||
369 | if (led->iout_joint) { | |
370 | fault_open_mask = FLASH_INT_FLED1_OPEN | FLASH_INT_FLED2_OPEN; | |
371 | fault_short_mask = FLASH_INT_FLED1_SHORT | | |
372 | FLASH_INT_FLED2_SHORT; | |
373 | } else { | |
374 | fault_open_mask = (sub_led->fled_id == FLED1) ? | |
375 | FLASH_INT_FLED1_OPEN : | |
376 | FLASH_INT_FLED2_OPEN; | |
377 | fault_short_mask = (sub_led->fled_id == FLED1) ? | |
378 | FLASH_INT_FLED1_SHORT : | |
379 | FLASH_INT_FLED2_SHORT; | |
380 | } | |
381 | ||
382 | ret = regmap_read(rmap, MAX77693_LED_REG_FLASH_INT, &v); | |
383 | if (ret < 0) | |
384 | return ret; | |
385 | ||
386 | if (v & fault_open_mask) | |
387 | sub_led->flash_faults |= LED_FAULT_OVER_VOLTAGE; | |
388 | if (v & fault_short_mask) | |
389 | sub_led->flash_faults |= LED_FAULT_SHORT_CIRCUIT; | |
390 | if (v & FLASH_INT_OVER_CURRENT) | |
391 | sub_led->flash_faults |= LED_FAULT_OVER_CURRENT; | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static int max77693_setup(struct max77693_led_device *led, | |
397 | struct max77693_led_config_data *led_cfg) | |
398 | { | |
399 | struct regmap *rmap = led->regmap; | |
400 | int i, first_led, last_led, ret; | |
401 | u32 max_flash_curr[2]; | |
402 | u8 v; | |
403 | ||
404 | /* | |
405 | * Initialize only flash current. Torch current doesn't | |
406 | * require initialization as ITORCH register is written with | |
407 | * new value each time brightness_set op is called. | |
408 | */ | |
409 | if (led->iout_joint) { | |
410 | first_led = FLED1; | |
411 | last_led = FLED1; | |
412 | max_flash_curr[FLED1] = led_cfg->iout_flash_max[FLED1] + | |
413 | led_cfg->iout_flash_max[FLED2]; | |
414 | } else { | |
415 | first_led = max77693_fled_used(led, FLED1) ? FLED1 : FLED2; | |
416 | last_led = max77693_fled_used(led, FLED2) ? FLED2 : FLED1; | |
417 | max_flash_curr[FLED1] = led_cfg->iout_flash_max[FLED1]; | |
418 | max_flash_curr[FLED2] = led_cfg->iout_flash_max[FLED2]; | |
419 | } | |
420 | ||
421 | for (i = first_led; i <= last_led; ++i) { | |
422 | ret = max77693_set_flash_current(led, i, | |
423 | max_flash_curr[i]); | |
424 | if (ret < 0) | |
425 | return ret; | |
426 | } | |
427 | ||
428 | v = TORCH_TMR_NO_TIMER | MAX77693_LED_TRIG_TYPE_LEVEL; | |
429 | ret = regmap_write(rmap, MAX77693_LED_REG_ITORCHTIMER, v); | |
430 | if (ret < 0) | |
431 | return ret; | |
432 | ||
433 | if (led_cfg->low_vsys > 0) | |
434 | v = max77693_led_vsys_to_reg(led_cfg->low_vsys) | | |
435 | MAX_FLASH1_MAX_FL_EN; | |
436 | else | |
437 | v = 0; | |
438 | ||
439 | ret = regmap_write(rmap, MAX77693_LED_REG_MAX_FLASH1, v); | |
440 | if (ret < 0) | |
441 | return ret; | |
442 | ret = regmap_write(rmap, MAX77693_LED_REG_MAX_FLASH2, 0); | |
443 | if (ret < 0) | |
444 | return ret; | |
445 | ||
446 | if (led_cfg->boost_mode == MAX77693_LED_BOOST_FIXED) | |
447 | v = FLASH_BOOST_FIXED; | |
448 | else | |
449 | v = led_cfg->boost_mode | led_cfg->boost_mode << 1; | |
450 | ||
451 | if (max77693_fled_used(led, FLED1) && max77693_fled_used(led, FLED2)) | |
452 | v |= FLASH_BOOST_LEDNUM_2; | |
453 | ||
454 | ret = regmap_write(rmap, MAX77693_LED_REG_VOUT_CNTL, v); | |
455 | if (ret < 0) | |
456 | return ret; | |
457 | ||
458 | v = max77693_led_vout_to_reg(led_cfg->boost_vout); | |
459 | ret = regmap_write(rmap, MAX77693_LED_REG_VOUT_FLASH1, v); | |
460 | if (ret < 0) | |
461 | return ret; | |
462 | ||
463 | return max77693_set_mode_reg(led, MODE_OFF); | |
464 | } | |
465 | ||
466 | static int __max77693_led_brightness_set(struct max77693_led_device *led, | |
467 | int fled_id, enum led_brightness value) | |
468 | { | |
469 | int ret; | |
470 | ||
471 | mutex_lock(&led->lock); | |
472 | ||
473 | if (value == 0) { | |
474 | ret = max77693_clear_mode(led, MODE_TORCH(fled_id)); | |
475 | if (ret < 0) | |
476 | dev_dbg(&led->pdev->dev, | |
477 | "Failed to clear torch mode (%d)\n", | |
478 | ret); | |
479 | goto unlock; | |
480 | } | |
481 | ||
482 | ret = max77693_set_torch_current(led, fled_id, value * TORCH_IOUT_STEP); | |
483 | if (ret < 0) { | |
484 | dev_dbg(&led->pdev->dev, | |
485 | "Failed to set torch current (%d)\n", | |
486 | ret); | |
487 | goto unlock; | |
488 | } | |
489 | ||
490 | ret = max77693_add_mode(led, MODE_TORCH(fled_id)); | |
491 | if (ret < 0) | |
492 | dev_dbg(&led->pdev->dev, | |
493 | "Failed to set torch mode (%d)\n", | |
494 | ret); | |
495 | unlock: | |
496 | mutex_unlock(&led->lock); | |
497 | return ret; | |
498 | } | |
499 | ||
500 | static void max77693_led_brightness_set_work( | |
501 | struct work_struct *work) | |
502 | { | |
503 | struct max77693_sub_led *sub_led = | |
504 | container_of(work, struct max77693_sub_led, | |
505 | work_brightness_set); | |
506 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
507 | ||
508 | __max77693_led_brightness_set(led, sub_led->fled_id, | |
509 | sub_led->torch_brightness); | |
510 | } | |
511 | ||
512 | /* LED subsystem callbacks */ | |
513 | ||
514 | static int max77693_led_brightness_set_sync( | |
515 | struct led_classdev *led_cdev, | |
516 | enum led_brightness value) | |
517 | { | |
518 | struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev); | |
519 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
520 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
521 | ||
522 | return __max77693_led_brightness_set(led, sub_led->fled_id, value); | |
523 | } | |
524 | ||
525 | static void max77693_led_brightness_set( | |
526 | struct led_classdev *led_cdev, | |
527 | enum led_brightness value) | |
528 | { | |
529 | struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev); | |
530 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
531 | ||
532 | sub_led->torch_brightness = value; | |
533 | schedule_work(&sub_led->work_brightness_set); | |
534 | } | |
535 | ||
536 | static int max77693_led_flash_brightness_set( | |
537 | struct led_classdev_flash *fled_cdev, | |
538 | u32 brightness) | |
539 | { | |
540 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
541 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
542 | int ret; | |
543 | ||
544 | mutex_lock(&led->lock); | |
545 | ret = max77693_set_flash_current(led, sub_led->fled_id, brightness); | |
546 | mutex_unlock(&led->lock); | |
547 | ||
548 | return ret; | |
549 | } | |
550 | ||
551 | static int max77693_led_flash_strobe_set( | |
552 | struct led_classdev_flash *fled_cdev, | |
553 | bool state) | |
554 | { | |
555 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
556 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
557 | int fled_id = sub_led->fled_id; | |
558 | int ret; | |
559 | ||
560 | mutex_lock(&led->lock); | |
561 | ||
562 | if (!state) { | |
563 | ret = max77693_clear_mode(led, MODE_FLASH(fled_id)); | |
564 | goto unlock; | |
565 | } | |
566 | ||
567 | if (sub_led->flash_timeout != led->current_flash_timeout) { | |
568 | ret = max77693_set_timeout(led, sub_led->flash_timeout); | |
569 | if (ret < 0) | |
570 | goto unlock; | |
571 | } | |
572 | ||
573 | led->strobing_sub_led_id = fled_id; | |
574 | ||
575 | ret = max77693_add_mode(led, MODE_FLASH(fled_id)); | |
576 | if (ret < 0) | |
577 | goto unlock; | |
578 | ||
579 | ret = max77693_get_flash_faults(sub_led); | |
580 | ||
581 | unlock: | |
582 | mutex_unlock(&led->lock); | |
583 | return ret; | |
584 | } | |
585 | ||
586 | static int max77693_led_flash_fault_get( | |
587 | struct led_classdev_flash *fled_cdev, | |
588 | u32 *fault) | |
589 | { | |
590 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
591 | ||
592 | *fault = sub_led->flash_faults; | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | static int max77693_led_flash_strobe_get( | |
598 | struct led_classdev_flash *fled_cdev, | |
599 | bool *state) | |
600 | { | |
601 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
602 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
603 | int ret; | |
604 | ||
605 | if (!state) | |
606 | return -EINVAL; | |
607 | ||
608 | mutex_lock(&led->lock); | |
609 | ||
610 | ret = max77693_get_strobe_status(led, state); | |
611 | ||
612 | *state = !!(*state && (led->strobing_sub_led_id == sub_led->fled_id)); | |
613 | ||
614 | mutex_unlock(&led->lock); | |
615 | ||
616 | return ret; | |
617 | } | |
618 | ||
619 | static int max77693_led_flash_timeout_set( | |
620 | struct led_classdev_flash *fled_cdev, | |
621 | u32 timeout) | |
622 | { | |
623 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
624 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
625 | ||
626 | mutex_lock(&led->lock); | |
627 | sub_led->flash_timeout = timeout; | |
628 | mutex_unlock(&led->lock); | |
629 | ||
630 | return 0; | |
631 | } | |
632 | ||
633 | static int max77693_led_parse_dt(struct max77693_led_device *led, | |
0b380186 JA |
634 | struct max77693_led_config_data *cfg, |
635 | struct device_node **sub_nodes) | |
a43f6a86 JA |
636 | { |
637 | struct device *dev = &led->pdev->dev; | |
638 | struct max77693_sub_led *sub_leds = led->sub_leds; | |
639 | struct device_node *node = dev->of_node, *child_node; | |
640 | struct property *prop; | |
641 | u32 led_sources[2]; | |
642 | int i, ret, fled_id; | |
643 | ||
644 | of_property_read_u32(node, "maxim,boost-mode", &cfg->boost_mode); | |
645 | of_property_read_u32(node, "maxim,boost-mvout", &cfg->boost_vout); | |
646 | of_property_read_u32(node, "maxim,mvsys-min", &cfg->low_vsys); | |
647 | ||
648 | for_each_available_child_of_node(node, child_node) { | |
649 | prop = of_find_property(child_node, "led-sources", NULL); | |
650 | if (prop) { | |
651 | const __be32 *srcs = NULL; | |
652 | ||
653 | for (i = 0; i < ARRAY_SIZE(led_sources); ++i) { | |
654 | srcs = of_prop_next_u32(prop, srcs, | |
655 | &led_sources[i]); | |
656 | if (!srcs) | |
657 | break; | |
658 | } | |
659 | } else { | |
660 | dev_err(dev, | |
661 | "led-sources DT property missing\n"); | |
662 | of_node_put(child_node); | |
663 | return -EINVAL; | |
664 | } | |
665 | ||
666 | if (i == 2) { | |
667 | fled_id = FLED1; | |
668 | led->fled_mask = FLED1_IOUT | FLED2_IOUT; | |
669 | } else if (led_sources[0] == FLED1) { | |
670 | fled_id = FLED1; | |
671 | led->fled_mask |= FLED1_IOUT; | |
672 | } else if (led_sources[0] == FLED2) { | |
673 | fled_id = FLED2; | |
674 | led->fled_mask |= FLED2_IOUT; | |
675 | } else { | |
676 | dev_err(dev, | |
677 | "Wrong led-sources DT property value.\n"); | |
678 | of_node_put(child_node); | |
679 | return -EINVAL; | |
680 | } | |
681 | ||
0b380186 JA |
682 | if (sub_nodes[fled_id]) { |
683 | dev_err(dev, | |
684 | "Conflicting \"led-sources\" DT properties\n"); | |
685 | return -EINVAL; | |
686 | } | |
687 | ||
688 | sub_nodes[fled_id] = child_node; | |
a43f6a86 JA |
689 | sub_leds[fled_id].fled_id = fled_id; |
690 | ||
691 | cfg->label[fled_id] = | |
692 | of_get_property(child_node, "label", NULL) ? : | |
693 | child_node->name; | |
694 | ||
695 | ret = of_property_read_u32(child_node, "led-max-microamp", | |
696 | &cfg->iout_torch_max[fled_id]); | |
697 | if (ret < 0) { | |
698 | cfg->iout_torch_max[fled_id] = TORCH_IOUT_MIN; | |
699 | dev_warn(dev, "led-max-microamp DT property missing\n"); | |
700 | } | |
701 | ||
702 | ret = of_property_read_u32(child_node, "flash-max-microamp", | |
703 | &cfg->iout_flash_max[fled_id]); | |
704 | if (ret < 0) { | |
705 | cfg->iout_flash_max[fled_id] = FLASH_IOUT_MIN; | |
706 | dev_warn(dev, | |
707 | "flash-max-microamp DT property missing\n"); | |
708 | } | |
709 | ||
710 | ret = of_property_read_u32(child_node, "flash-max-timeout-us", | |
711 | &cfg->flash_timeout_max[fled_id]); | |
712 | if (ret < 0) { | |
713 | cfg->flash_timeout_max[fled_id] = FLASH_TIMEOUT_MIN; | |
714 | dev_warn(dev, | |
715 | "flash-max-timeout-us DT property missing\n"); | |
716 | } | |
717 | ||
718 | if (++cfg->num_leds == 2 || | |
719 | (max77693_fled_used(led, FLED1) && | |
720 | max77693_fled_used(led, FLED2))) { | |
721 | of_node_put(child_node); | |
722 | break; | |
723 | } | |
724 | } | |
725 | ||
726 | if (cfg->num_leds == 0) { | |
727 | dev_err(dev, "No DT child node found for connected LED(s).\n"); | |
728 | return -EINVAL; | |
729 | } | |
730 | ||
731 | return 0; | |
732 | } | |
733 | ||
734 | static void clamp_align(u32 *v, u32 min, u32 max, u32 step) | |
735 | { | |
736 | *v = clamp_val(*v, min, max); | |
737 | if (step > 1) | |
738 | *v = (*v - min) / step * step + min; | |
739 | } | |
740 | ||
741 | static void max77693_align_iout_current(struct max77693_led_device *led, | |
742 | u32 *iout, u32 min, u32 max, u32 step) | |
743 | { | |
744 | int i; | |
745 | ||
746 | if (led->iout_joint) { | |
747 | if (iout[FLED1] > min) { | |
748 | iout[FLED1] /= 2; | |
749 | iout[FLED2] = iout[FLED1]; | |
750 | } else { | |
751 | iout[FLED1] = min; | |
752 | iout[FLED2] = 0; | |
753 | return; | |
754 | } | |
755 | } | |
756 | ||
757 | for (i = FLED1; i <= FLED2; ++i) | |
758 | if (max77693_fled_used(led, i)) | |
759 | clamp_align(&iout[i], min, max, step); | |
760 | else | |
761 | iout[i] = 0; | |
762 | } | |
763 | ||
764 | static void max77693_led_validate_configuration(struct max77693_led_device *led, | |
765 | struct max77693_led_config_data *cfg) | |
766 | { | |
767 | u32 flash_iout_max = cfg->boost_mode ? FLASH_IOUT_MAX_2LEDS : | |
768 | FLASH_IOUT_MAX_1LED; | |
769 | int i; | |
770 | ||
771 | if (cfg->num_leds == 1 && | |
772 | max77693_fled_used(led, FLED1) && max77693_fled_used(led, FLED2)) | |
773 | led->iout_joint = true; | |
774 | ||
775 | cfg->boost_mode = clamp_val(cfg->boost_mode, MAX77693_LED_BOOST_NONE, | |
776 | MAX77693_LED_BOOST_FIXED); | |
777 | ||
778 | /* Boost must be enabled if both current outputs are used */ | |
779 | if ((cfg->boost_mode == MAX77693_LED_BOOST_NONE) && led->iout_joint) | |
780 | cfg->boost_mode = MAX77693_LED_BOOST_FIXED; | |
781 | ||
782 | max77693_align_iout_current(led, cfg->iout_torch_max, | |
783 | TORCH_IOUT_MIN, TORCH_IOUT_MAX, TORCH_IOUT_STEP); | |
784 | ||
785 | max77693_align_iout_current(led, cfg->iout_flash_max, | |
786 | FLASH_IOUT_MIN, flash_iout_max, FLASH_IOUT_STEP); | |
787 | ||
788 | for (i = 0; i < ARRAY_SIZE(cfg->flash_timeout_max); ++i) | |
789 | clamp_align(&cfg->flash_timeout_max[i], FLASH_TIMEOUT_MIN, | |
790 | FLASH_TIMEOUT_MAX, FLASH_TIMEOUT_STEP); | |
791 | ||
792 | clamp_align(&cfg->boost_vout, FLASH_VOUT_MIN, FLASH_VOUT_MAX, | |
793 | FLASH_VOUT_STEP); | |
794 | ||
795 | if (cfg->low_vsys) | |
796 | clamp_align(&cfg->low_vsys, MAX_FLASH1_VSYS_MIN, | |
797 | MAX_FLASH1_VSYS_MAX, MAX_FLASH1_VSYS_STEP); | |
798 | } | |
799 | ||
800 | static int max77693_led_get_configuration(struct max77693_led_device *led, | |
0b380186 JA |
801 | struct max77693_led_config_data *cfg, |
802 | struct device_node **sub_nodes) | |
a43f6a86 JA |
803 | { |
804 | int ret; | |
805 | ||
0b380186 | 806 | ret = max77693_led_parse_dt(led, cfg, sub_nodes); |
a43f6a86 JA |
807 | if (ret < 0) |
808 | return ret; | |
809 | ||
810 | max77693_led_validate_configuration(led, cfg); | |
811 | ||
812 | memcpy(led->iout_torch_max, cfg->iout_torch_max, | |
813 | sizeof(led->iout_torch_max)); | |
814 | memcpy(led->iout_flash_max, cfg->iout_flash_max, | |
815 | sizeof(led->iout_flash_max)); | |
816 | ||
817 | return 0; | |
818 | } | |
819 | ||
820 | static const struct led_flash_ops flash_ops = { | |
821 | .flash_brightness_set = max77693_led_flash_brightness_set, | |
822 | .strobe_set = max77693_led_flash_strobe_set, | |
823 | .strobe_get = max77693_led_flash_strobe_get, | |
824 | .timeout_set = max77693_led_flash_timeout_set, | |
825 | .fault_get = max77693_led_flash_fault_get, | |
826 | }; | |
827 | ||
828 | static void max77693_init_flash_settings(struct max77693_sub_led *sub_led, | |
829 | struct max77693_led_config_data *led_cfg) | |
830 | { | |
831 | struct led_classdev_flash *fled_cdev = &sub_led->fled_cdev; | |
832 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
833 | int fled_id = sub_led->fled_id; | |
834 | struct led_flash_setting *setting; | |
835 | ||
836 | /* Init flash intensity setting */ | |
837 | setting = &fled_cdev->brightness; | |
838 | setting->min = FLASH_IOUT_MIN; | |
839 | setting->max = led->iout_joint ? | |
840 | led_cfg->iout_flash_max[FLED1] + | |
841 | led_cfg->iout_flash_max[FLED2] : | |
842 | led_cfg->iout_flash_max[fled_id]; | |
843 | setting->step = FLASH_IOUT_STEP; | |
844 | setting->val = setting->max; | |
845 | ||
846 | /* Init flash timeout setting */ | |
847 | setting = &fled_cdev->timeout; | |
848 | setting->min = FLASH_TIMEOUT_MIN; | |
849 | setting->max = led_cfg->flash_timeout_max[fled_id]; | |
850 | setting->step = FLASH_TIMEOUT_STEP; | |
851 | setting->val = setting->max; | |
852 | } | |
853 | ||
0b380186 JA |
854 | #if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) |
855 | ||
856 | static int max77693_led_external_strobe_set( | |
857 | struct v4l2_flash *v4l2_flash, | |
858 | bool enable) | |
859 | { | |
860 | struct max77693_sub_led *sub_led = | |
861 | flcdev_to_sub_led(v4l2_flash->fled_cdev); | |
862 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
863 | int fled_id = sub_led->fled_id; | |
864 | int ret; | |
865 | ||
866 | mutex_lock(&led->lock); | |
867 | ||
868 | if (enable) | |
869 | ret = max77693_add_mode(led, MODE_FLASH_EXTERNAL(fled_id)); | |
870 | else | |
871 | ret = max77693_clear_mode(led, MODE_FLASH_EXTERNAL(fled_id)); | |
872 | ||
873 | mutex_unlock(&led->lock); | |
874 | ||
875 | return ret; | |
876 | } | |
877 | ||
878 | static void max77693_init_v4l2_flash_config(struct max77693_sub_led *sub_led, | |
879 | struct max77693_led_config_data *led_cfg, | |
880 | struct v4l2_flash_config *v4l2_sd_cfg) | |
881 | { | |
882 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
883 | struct device *dev = &led->pdev->dev; | |
884 | struct max77693_dev *iodev = dev_get_drvdata(dev->parent); | |
885 | struct i2c_client *i2c = iodev->i2c; | |
886 | struct led_flash_setting *s; | |
887 | ||
888 | snprintf(v4l2_sd_cfg->dev_name, sizeof(v4l2_sd_cfg->dev_name), | |
889 | "%s %d-%04x", sub_led->fled_cdev.led_cdev.name, | |
890 | i2c_adapter_id(i2c->adapter), i2c->addr); | |
891 | ||
892 | s = &v4l2_sd_cfg->torch_intensity; | |
893 | s->min = TORCH_IOUT_MIN; | |
894 | s->max = sub_led->fled_cdev.led_cdev.max_brightness * TORCH_IOUT_STEP; | |
895 | s->step = TORCH_IOUT_STEP; | |
896 | s->val = s->max; | |
897 | ||
898 | /* Init flash faults config */ | |
899 | v4l2_sd_cfg->flash_faults = LED_FAULT_OVER_VOLTAGE | | |
900 | LED_FAULT_SHORT_CIRCUIT | | |
901 | LED_FAULT_OVER_CURRENT; | |
902 | ||
903 | v4l2_sd_cfg->has_external_strobe = true; | |
904 | } | |
905 | ||
906 | static const struct v4l2_flash_ops v4l2_flash_ops = { | |
907 | .external_strobe_set = max77693_led_external_strobe_set, | |
908 | }; | |
909 | #else | |
910 | static inline void max77693_init_v4l2_flash_config( | |
911 | struct max77693_sub_led *sub_led, | |
912 | struct max77693_led_config_data *led_cfg, | |
913 | struct v4l2_flash_config *v4l2_sd_cfg) | |
914 | { | |
915 | } | |
916 | static const struct v4l2_flash_ops v4l2_flash_ops; | |
917 | #endif | |
918 | ||
a43f6a86 JA |
919 | static void max77693_init_fled_cdev(struct max77693_sub_led *sub_led, |
920 | struct max77693_led_config_data *led_cfg) | |
921 | { | |
922 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
923 | int fled_id = sub_led->fled_id; | |
924 | struct led_classdev_flash *fled_cdev; | |
925 | struct led_classdev *led_cdev; | |
926 | ||
927 | /* Initialize LED Flash class device */ | |
928 | fled_cdev = &sub_led->fled_cdev; | |
929 | fled_cdev->ops = &flash_ops; | |
930 | led_cdev = &fled_cdev->led_cdev; | |
931 | ||
932 | led_cdev->name = led_cfg->label[fled_id]; | |
933 | ||
934 | led_cdev->brightness_set = max77693_led_brightness_set; | |
935 | led_cdev->brightness_set_sync = max77693_led_brightness_set_sync; | |
936 | led_cdev->max_brightness = (led->iout_joint ? | |
937 | led_cfg->iout_torch_max[FLED1] + | |
938 | led_cfg->iout_torch_max[FLED2] : | |
939 | led_cfg->iout_torch_max[fled_id]) / | |
940 | TORCH_IOUT_STEP; | |
941 | led_cdev->flags |= LED_DEV_CAP_FLASH; | |
942 | INIT_WORK(&sub_led->work_brightness_set, | |
943 | max77693_led_brightness_set_work); | |
944 | ||
945 | max77693_init_flash_settings(sub_led, led_cfg); | |
946 | ||
947 | /* Init flash timeout cache */ | |
948 | sub_led->flash_timeout = fled_cdev->timeout.val; | |
949 | } | |
950 | ||
0b380186 JA |
951 | static int max77693_register_led(struct max77693_sub_led *sub_led, |
952 | struct max77693_led_config_data *led_cfg, | |
953 | struct device_node *sub_node) | |
954 | { | |
955 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
956 | struct led_classdev_flash *fled_cdev = &sub_led->fled_cdev; | |
957 | struct device *dev = &led->pdev->dev; | |
958 | struct v4l2_flash_config v4l2_sd_cfg = {}; | |
959 | int ret; | |
960 | ||
961 | /* Register in the LED subsystem */ | |
962 | ret = led_classdev_flash_register(dev, fled_cdev); | |
963 | if (ret < 0) | |
964 | return ret; | |
965 | ||
966 | max77693_init_v4l2_flash_config(sub_led, led_cfg, &v4l2_sd_cfg); | |
967 | ||
968 | /* Register in the V4L2 subsystem. */ | |
969 | sub_led->v4l2_flash = v4l2_flash_init(dev, sub_node, fled_cdev, NULL, | |
970 | &v4l2_flash_ops, &v4l2_sd_cfg); | |
971 | if (IS_ERR(sub_led->v4l2_flash)) { | |
972 | ret = PTR_ERR(sub_led->v4l2_flash); | |
973 | goto err_v4l2_flash_init; | |
974 | } | |
975 | ||
976 | return 0; | |
977 | ||
978 | err_v4l2_flash_init: | |
979 | led_classdev_flash_unregister(fled_cdev); | |
980 | return ret; | |
981 | } | |
982 | ||
a43f6a86 JA |
983 | static int max77693_led_probe(struct platform_device *pdev) |
984 | { | |
985 | struct device *dev = &pdev->dev; | |
986 | struct max77693_dev *iodev = dev_get_drvdata(dev->parent); | |
987 | struct max77693_led_device *led; | |
988 | struct max77693_sub_led *sub_leds; | |
0b380186 | 989 | struct device_node *sub_nodes[2] = {}; |
a43f6a86 JA |
990 | struct max77693_led_config_data led_cfg = {}; |
991 | int init_fled_cdev[2], i, ret; | |
992 | ||
993 | led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL); | |
994 | if (!led) | |
995 | return -ENOMEM; | |
996 | ||
997 | led->pdev = pdev; | |
998 | led->regmap = iodev->regmap; | |
999 | led->allowed_modes = MODE_FLASH_MASK; | |
1000 | sub_leds = led->sub_leds; | |
1001 | ||
1002 | platform_set_drvdata(pdev, led); | |
0b380186 | 1003 | ret = max77693_led_get_configuration(led, &led_cfg, sub_nodes); |
a43f6a86 JA |
1004 | if (ret < 0) |
1005 | return ret; | |
1006 | ||
1007 | ret = max77693_setup(led, &led_cfg); | |
1008 | if (ret < 0) | |
1009 | return ret; | |
1010 | ||
1011 | mutex_init(&led->lock); | |
1012 | ||
1013 | init_fled_cdev[FLED1] = | |
1014 | led->iout_joint || max77693_fled_used(led, FLED1); | |
1015 | init_fled_cdev[FLED2] = | |
1016 | !led->iout_joint && max77693_fled_used(led, FLED2); | |
1017 | ||
1018 | for (i = FLED1; i <= FLED2; ++i) { | |
1019 | if (!init_fled_cdev[i]) | |
1020 | continue; | |
1021 | ||
1022 | /* Initialize LED Flash class device */ | |
1023 | max77693_init_fled_cdev(&sub_leds[i], &led_cfg); | |
1024 | ||
0b380186 JA |
1025 | /* |
1026 | * Register LED Flash class device and corresponding | |
1027 | * V4L2 Flash device. | |
1028 | */ | |
1029 | ret = max77693_register_led(&sub_leds[i], &led_cfg, | |
1030 | sub_nodes[i]); | |
a43f6a86 JA |
1031 | if (ret < 0) { |
1032 | /* | |
1033 | * At this moment FLED1 might have been already | |
1034 | * registered and it needs to be released. | |
1035 | */ | |
1036 | if (i == FLED2) | |
1037 | goto err_register_led2; | |
1038 | else | |
1039 | goto err_register_led1; | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | return 0; | |
1044 | ||
1045 | err_register_led2: | |
1046 | /* It is possible than only FLED2 was to be registered */ | |
1047 | if (!init_fled_cdev[FLED1]) | |
1048 | goto err_register_led1; | |
0b380186 | 1049 | v4l2_flash_release(sub_leds[FLED1].v4l2_flash); |
a43f6a86 JA |
1050 | led_classdev_flash_unregister(&sub_leds[FLED1].fled_cdev); |
1051 | err_register_led1: | |
1052 | mutex_destroy(&led->lock); | |
1053 | ||
1054 | return ret; | |
1055 | } | |
1056 | ||
1057 | static int max77693_led_remove(struct platform_device *pdev) | |
1058 | { | |
1059 | struct max77693_led_device *led = platform_get_drvdata(pdev); | |
1060 | struct max77693_sub_led *sub_leds = led->sub_leds; | |
1061 | ||
1062 | if (led->iout_joint || max77693_fled_used(led, FLED1)) { | |
0b380186 | 1063 | v4l2_flash_release(sub_leds[FLED1].v4l2_flash); |
a43f6a86 JA |
1064 | led_classdev_flash_unregister(&sub_leds[FLED1].fled_cdev); |
1065 | cancel_work_sync(&sub_leds[FLED1].work_brightness_set); | |
1066 | } | |
1067 | ||
1068 | if (!led->iout_joint && max77693_fled_used(led, FLED2)) { | |
0b380186 | 1069 | v4l2_flash_release(sub_leds[FLED2].v4l2_flash); |
a43f6a86 JA |
1070 | led_classdev_flash_unregister(&sub_leds[FLED2].fled_cdev); |
1071 | cancel_work_sync(&sub_leds[FLED2].work_brightness_set); | |
1072 | } | |
1073 | ||
1074 | mutex_destroy(&led->lock); | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | static const struct of_device_id max77693_led_dt_match[] = { | |
1080 | { .compatible = "maxim,max77693-led" }, | |
1081 | {}, | |
1082 | }; | |
e3df661f | 1083 | MODULE_DEVICE_TABLE(of, max77693_led_dt_match); |
a43f6a86 JA |
1084 | |
1085 | static struct platform_driver max77693_led_driver = { | |
1086 | .probe = max77693_led_probe, | |
1087 | .remove = max77693_led_remove, | |
1088 | .driver = { | |
1089 | .name = "max77693-led", | |
1090 | .of_match_table = max77693_led_dt_match, | |
1091 | }, | |
1092 | }; | |
1093 | ||
1094 | module_platform_driver(max77693_led_driver); | |
1095 | ||
1096 | MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>"); | |
1097 | MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>"); | |
1098 | MODULE_DESCRIPTION("Maxim MAX77693 led flash driver"); | |
1099 | MODULE_LICENSE("GPL v2"); |